HardCore JavaScript (HCJS) is an elite engineering agency. We architect, optimize, and rescue complex Node.js backends and React ecosystems.
$ npm run collaborateV8 engine memory profiling, event-loop blocking resolution, and microservices architecture for handling millions of concurrent connections.
Next.js SSR/SSG tuning, complex state management refactoring, and delivering perfect Core Web Vitals for enterprise frontends.
Bulletproof strict typing setups. We untangle legacy JS codebases and enforce architectural rigidity through advanced TS patterns.